If Stacy can paint \( \frac{3}{4} \) of the bedroom in 3 hours, we can find out how long it takes to paint the entire bedroom by setting up a proportion.
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First, find the rate at which she paints: \[ \text{Rate} = \frac{\text{part of room painted}}{\text{time}} = \frac{3/4}{3} = \frac{1}{4} \text{ of the room per hour} \]
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Since it takes her 1 hour to paint \( \frac{1}{4} \) of the room, we can find how long it takes to paint the whole room (1 room): \[ \text{Time to paint 1 room} = \frac{1 \text{ room}}{1/4 \text{ room per hour}} = 4 \text{ hours} \]
So, it will take Stacy 4 hours to paint the entire room.
The correct response is 4 hours.